I hate good knight! bought a new machine bcoz we had 3 refills and broke the old machine accidentally. Find that new refills doesn't fit into old machines But get "all out". Even though they changed their design (from yellow to blue) , the old refills fit perfectly into new machines.
went back. turns out the machines they had were of the old design. found one refill bottle. got that for now. awful move by the company management. it's not like the new design is compact or more efficient. looks like a douche move to force people to get newer units.
Take out carbon rod from other empty bottle.. I'm doing that for last 3 month.. Dont throw old bottles they give discount for those in offers. This shity new thing is introduced 3-4 month back i guess.